| Hz | Absorption Coefficient |
| 125 | 0.23 |
| 160 | 0.21 |
| 200 | 0.26 |
| 250 | 0.24 |
| 315 | 0.29 |
| 400 | 0.30 |
| 500 | 0.35 |
| 630 | 0.33 |
| 800 | 0.26 |
| 1000 | 0.23 |
| 1250 | 0.20 |
| 1600 | 0.18 |
| 2000 | 0.20 |
| 2500 | 0.21 |
| 3150 | 0.21 |
| 4000 | 0.20 |
Absorption Coefficients
Measured According to ASTM C423 at Riverbank Acoustical Laboratories (RAL-A86-126)
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2000, RPG Diffusor Systems, Inc. |